508
FXUS64 KMRX 251723 AAA
AFDMRX
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
1223 PM EST SUN JAN 25 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 1221 PM EST SUN JAN 25 2026
- FREEZING RAIN, EXCEPT WINTRY MIX FOR SOUTHWEST VIRGINIA WILL END
THIS MORNING. SIGNIFICANT ICE ACCUMULATIONS HAVE BEEN REPORTED
WITH SOME POWER OUTAGES ESPECIALLY ACROSS THE PLATEAU AND
WESTERN SECTIONS OF THE TENNESSEE VALLEY.
- HIGH WINDS EXPECTED ACROSS THE FOOTHILLS OF THE MOUNTAINS AND
RIDGE TOPS TODAY. GUSTS OF 70 MPH, EXCEPT UP TO 90 MPH POSSIBLE
FOR COVE MOUNTAIN.
- LIGHT SNOW ACCUMULATIONS POSSIBLE TONIGHT FOR AREAS NORTH OF
INTERSTATE 40 AND FAR EAST TENNESSEE MOUNTAINS ESPECIALLY ACROSS
THE HIGHER ELEVATIONS.
- EXTREME COLD TEMPERATURES ARE EXPECTED MONDAY INTO TUESDAY WITH
HIGHS WELL BELOW FREEZING AND OVERNIGHT LOWS APPROACHING OR
FALLING BELOW 0. LOWER WIND CHILLS ARE EXPECTED. COLD WEATHER
ADVISORY FOR THE ENTIRE AREA FOR LATE TONIGHT/MONDAY MORNING.
COLD WEATHER WATCH/ADVISORIES LIKELY NEEDED FOR MONDAY
NIGHT/TUESDAY MORNING.
UPDATE
ISSUED AT 1000 AM EST SUN JAN 25 2026
NEARLY ALL OF THE AREA IS ABOVE FREEZING NOW, AND THE WINTER
HEADLINES ARE BEGINNING TO EXPIRE ON SCHEDULE. OUR FAR NORTHEAST
CORNER AROUND WASHINGTON COUNTY VA IS STILL BELOW FREEZING AS THE
COLD AIR IMPINGING INTO THAT AREA FROM THE NORTHEAST IS STILL
HANGING TOUGH. THIS IS THE ONLY AREA STILL OF CONCERN FOR ICING
AND THIS WILL NEED TO BE MONITORED, ALTHOUGH THE HI-RES GUIDANCE
GENERALLY AGREES IT WILL CLIMB ABOVE FREEZING EVEN THERE OVER THE
NEXT FEW HOURS. HAVE MADE A FEW ADJUSTMENTS TO THE FORECAST BASED
ON THE LATEST OBSERVED TRENDS, BUT NO MAJOR CHANGES.
DISCUSSION
ISSUED AT 1242 AM EST SUN JAN 25 2026
CURRENTLY MUCH OF THE FORECAST AREA IS HOVERING AROUND 32 DEGREES
WHERE LIGHT FREEZING RAIN IS OCCURRING, EXCEPT 25 TO 30 DEGREES
ACROSS SOUTHWEST VIRGINIA WHERE A WINTRY MIX IS REPORTED.
ICE ACCUMULATIONS OF 0.15 TO 0.30 INCH HAVE BEEN REPORTED OVER MUCH
OF THE AREA WITH 1 TO 3 INCHES OF SNOW OVER SOUTHWEST VIRGINIA.
INCREASING SOUTHERLY 850MB JET IS PULLING WARMER AIR ALOFT WITH THE
ZERO LINE IS NORTH OF THE TENNESSEE VALLEY AND SOUTHERN APPALACHIANS
WITH THE SHALLOW COLD AIR SLOWLY ERODING. ALSO, DOWNSLOPE WINDS OFF
THE FAR EAST TENNESSEE MOUNTAINS IS ALSO ERODING THE COLD AIR ACROSS
THE EASTERN SIDE OF THE VALLEY. GIVEN THESE FACTORS WE CONTINUE TO
EXPECT A GRADUAL MODERATION OF TEMPERATURES EARLY THIS MORNING
CHANGING THE PRECIPITATION TO RAIN. HREF AND REFS DEPICT THE
INCREASING TEMPERATURES THROUGH DAYBREAK THUS HAVE SET THE END TIMES
OF THE WINTER HEADLINES FOR 14-16Z THIS MORNING.
FOR TODAY, MODELS DEPICT A ANOMALY STRONG 300MB JET OF 190+ KNOTS
OVER SOUTHERN CANADA WITH ANOTHER JET EXITING THE SOUTHERN STREAM
TROUGH. BROAD DIVERGENCE OVER THE TENNESSEE VALLEY ESPECIALLY THIS
AFTERNOON/EARLY EVENING WILL STRONG THE FRONTO-GENETIC FORCING
ALLOWING FOR A BAND OF SHOWERS. NAEFS SHOWS ANOMALY STRONG 850MB
MOISTURE TRANSPORT AND PWS FOR THIS AFTERNOON SO A PERIOD OF
MODERATE TO HEAVY RAIN WILL ACCOMPANY THIS BAND. LOCALLY HEAVY
RAINFALL AMOUNTS EXPECTED BUT ONGOING DROUGHT CONDITIONS WILL LIMIT
ANY LOCALIZING FLOODING POTENTIAL.
STRONG 850MB SOUTHERLY JET OF 70+ KNOTS AND STRONG PRESSURE GRADIENT
FROM CAROLINA SURFACE WEDGE AND LEE TROUGH OVER THE TENNESSEE
FOOTHILLS WILL PRODUCE A HIGH-END MOUNTAIN WAVE EVENT FOR THE FAR
EAST TENNESSEE MOUNTAINS AND FOOTHILLS. GUSTS OF 60-70 MPH WILL BE
COMMON WITH THE POTENTIAL OF 90+ MPH AT COVE MOUNTAIN.
FOR TONIGHT, A STRONG COLD FRONT WILL USHER IN ARCTIC LIKE AIR INTO
THE REGION WITH WIND CHILLS DROPPING TO 3 TO 8 DEGREES ABOVE ZERO
ACROSS MUCH OF THE REGION, EXCEPT 5 TO 10 DEGREES BELOW ZERO ACROSS
THE FAR EAST TENNESSEE MOUNTAINS. A COLD WEATHER ADVISORY HAS BEEN
ISSUED FOR THE ENTIRE REGION FOR LATE TONIGHT AND MONDAY MORNING.
THE COLD AIR WILL ALSO SQUEEZE OUT FLURRIES AND SNOW SHOWERS OVER
THE NORTHERN HALF OF THE AREA AND OROGRAPHIC LIFT WILL ENHANCE SNOW
SHOWERS FOR THE FAVORED UPSLOPE AREAS TONIGHT. MINOR ACCUMULATIONS
POSSIBLE ESPECIALLY OVER THE HIGHER TERRAIN.
FOR MONDAY AND TUESDAY, VERY COLD ARCTIC AIRMASS WITH EITHER COLD
WEATHER WARNING OR ADVISORIES NEEDED FOR MUCH OF THE REGION MONDAY
NIGHT.
AS WE MOVE INTO MID-WEEK, MAX TEMPERATURES BEGIN TO MODERATE BUT
REMAIN 10 TO 15 DEGREES BELOW NORMAL WEDNESDAY. ANOTHER COLD FRONT
WILL BRING A REINFORCING COLD AIRMASS BY LATE NEXT WEEK WITH
TEMPERATURES STRUGGLING TO GET ABOVE FREEZING LATE THIS WEEK.
THURSDAY.
AVIATION
(18Z TAFS)
ISSUED AT 1221 PM EST SUN JAN 25 2026
RAIN WILL CONTINUE ACROSS THE AREA THROUGH THE AFTERNOON, TAPERING
OFF IN THE EVENING. IFR CONDITIONS WILL PREVAIL AT CHA AND TYS
DURING THE RAIN, WHILE TRI WILL BE MAINLY VFR DUE TO DOWNSLOPE
WINDS. A FRONT WILL PASS THROUGH THE AREA OVERNIGHT, SHIFTING
WINDS TO WEST TO NORTHWEST AND BRINGING MIXING THAT WILL LIFT
PREDOMINANT CIGS TO MVFR. WINDS MAY BECOME GUSTY LATE IN THE TAF
PERIOD.
PRELIMINARY POINT TEMPS/POPS
CHATTANOOGA AIRPORT, TN 18 31 11 40 / 10 0 0 0
KNOXVILLE MCGHEE TYSON AIRPORT, TN 18 28 7 36 / 30 0 0 0
OAK RIDGE, TN 16 28 6 36 / 20 0 0 0
TRI CITIES AIRPORT, TN 17 25 5 31 / 60 10 0 0
MRX WATCHES/WARNINGS/ADVISORIES
NC...COLD WEATHER ADVISORY FROM MIDNIGHT TONIGHT TO 10 AM EST MONDAY
FOR CHEROKEE-CLAY.
COLD WEATHER ADVISORY FROM 6 PM MONDAY TO NOON EST TUESDAY FOR
CHEROKEE-CLAY.
TN...COLD WEATHER ADVISORY FROM MIDNIGHT EST /11 PM CST/ TONIGHT TO
10 AM EST /9 AM CST/ MONDAY FOR ANDERSON-BLEDSOE-BLOUNT
SMOKY MOUNTAINS-BRADLEY-CAMPBELL-CLAIBORNE-COCKE SMOKY
MOUNTAINS-EAST POLK-GRAINGER-HAMBLEN-HAMILTON-HANCOCK-
HAWKINS-JEFFERSON-JOHNSON-KNOX-LOUDON-MARION-MCMINN-MEIGS-
MORGAN-NORTH SEVIER-NORTHWEST BLOUNT-NORTHWEST CARTER-
NORTHWEST COCKE-NORTHWEST GREENE-NORTHWEST MONROE-RHEA-
ROANE-SCOTT TN-SEQUATCHIE-SEVIER SMOKY MOUNTAINS-SOUTHEAST
CARTER-SOUTHEAST GREENE-SOUTHEAST MONROE-SULLIVAN-UNICOI-
UNION-WASHINGTON TN-WEST POLK.
COLD WEATHER ADVISORY FROM 6 PM EST /5 PM CST/ MONDAY TO NOON
EST /11 AM CST/ TUESDAY FOR ANDERSON-BLEDSOE-BRADLEY-
CAMPBELL-CLAIBORNE-EAST POLK-GRAINGER-HAMBLEN-HAMILTON-
HANCOCK-HAWKINS-JEFFERSON-KNOX-LOUDON-MARION-MCMINN-MEIGS-
MORGAN-NORTH SEVIER-NORTHWEST BLOUNT-NORTHWEST CARTER-
NORTHWEST COCKE-NORTHWEST GREENE-NORTHWEST MONROE-RHEA-
ROANE-SCOTT TN-SEQUATCHIE-SOUTHEAST MONROE-SULLIVAN-UNION-
WASHINGTON TN-WEST POLK.
EXTREME COLD WATCH FROM MONDAY EVENING THROUGH TUESDAY MORNING
FOR BLOUNT SMOKY MOUNTAINS-COCKE SMOKY MOUNTAINS-JOHNSON-
SEVIER SMOKY MOUNTAINS-SOUTHEAST CARTER-SOUTHEAST GREENE-
UNICOI.
HIGH WIND WARNING UNTIL 7 PM EST THIS EVENING FOR BLOUNT SMOKY
MOUNTAINS-COCKE SMOKY MOUNTAINS-SEVIER SMOKY MOUNTAINS-
SOUTHEAST CARTER-SOUTHEAST GREENE-SOUTHEAST MONROE-UNICOI.
VA...COLD WEATHER ADVISORY FROM MIDNIGHT TONIGHT TO 10 AM EST MONDAY
FOR LEE-RUSSELL-SCOTT VA-WASHINGTON VA-WISE.
EXTREME COLD WATCH FROM MONDAY EVENING THROUGH TUESDAY MORNING
FOR LEE-RUSSELL-SCOTT VA-WASHINGTON VA-WISE.
DISCUSSION...DH
AVIATION...DGS
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page